Antenna



H. GIROUX I March 31 1942.

ANTENNA Filed Oct. 31, 1940 v INVENTOR.

Patented Mar. 31, 1942 ANTENNA Henry Giroux, Westfield, Mass, assignor to The F. W. Sickles Company, Chicopee, Mass, a corporation of Massachusetts Application October 31, 1940, Serial No. 363,705

3 Claims.

This invention relates to windings or coils adapted for use in connection with radio apparatuses and is directed particularly to a coil or inductance adapted for use as an antenna such as are used on radio receiving apparatuses.

The novel features of the invention are directed to the provision of a coil or inductance Which among other uses may be used as an antenna for a radio receiver due to its construction and arrangement. By reason of the novel construction and arrangement the coil has a reduced distributive capacity, lower high frequency resistance, and a less dielectric loss than coils of the prior art. To accomplish this as a special feature of the invention, the elements or wires forming the coil are arranged in such a way as to be more or less reinforced so as to produce a coil which is less fragile than coils heretofore known.

With the foregoing and various other novel features and advantages and other objects of my invention as will become more apparent as the description proceeds, the invention consists in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more particularly pointed out in the claims hereunto annexed and more fully described and referred to in connection with the accompanying drawing wherein:

Fig. l is a plan view of a coil construction embodying the novel features of the invention;

Fig. 2 is a plan view of a wire used in the construction of the coil to explain the formation thereof; and

Figs. 3 and 4 are plan views showing adjacent convolutions of the coil windings as they may be arranged in coil-forming relation.

Referring now to the drawing more in detail, the invention will be fully described.

A coil C of the invention as shown in Fig. l which is supported in some suitable manner as by a support member indicated generally by 2. The support may take any form desired but in the form of the invention shown, the member 2 has a main body portion 4 and a plurality of arms 6, there being one or more openings such as 8 therein, if desired. Terminals l may be carried by the support to which may be secured the ends of the coil. To these same members Ill connections may be made to the apparatus with which the coil is used. The support in Fig. 1 is preferably provided with flat coil supporting surfaces.

A wire or wires of which th coil C is constructed, is shown at W in Fig. 2. The wire W in said Fig. 2 is alternately offset in opposite directions or is crimped to provide hills and valleys I2 or projections and depressions I4. The wire may be of any size or construction desired and may be insulated in any desired manner.

The coil C may be formed from one or more of the elements or wires such as W although, as shown, the coil in Fig. 1 is formed from a single element wound more or less circularly and disposed on the support with the hills of the element in one convolution of the coil extending towards the next adjacent convolution. As will be seen, the coil formation is flat and in shape it may take any form desired.

The element may be arranged so that the convolutions are related in various ways. In Fig. 3 so the hills l2 of one convolution abut the hills I2 of the next adjacent convolution or convolutions. Or in another way, the hills I2 may be nested in the valleys I4 as shown in Fig. 4. The coil may be made up so that the convolution of the element may be arranged as may be desired, with or without a particular uniform relative arrangement. In any event, the wire, which is usually insulated wire, is arranged so that the portions of adjacent convolutions are spaced, or at least the wire in one convolution is spaced from the wire of adjacent convolutions at spaced points. That is a coil is provided wherein portions of the convolutions are spaced from adjacent convolutions as distinguished from constructions where the convolutions are arranged in parallelism. This is accomplished by the novel formation of the wire or element and relative arrangement of the convolutions.

Not only does the formation of the wire function to enforce the same but the effects resulting from the formation of the wire and relative arrangement of the convolutions of the winding are very desirable. Among the especially desired characteristics there is less dielectric loss, reduced distributive capacity, a lower high frequency resistance.

When the coil is disposed on the support, which preferably will have a flat coil supporting surface or surfaces, the wire is arranged so that the projections of the convolutions extend towards adjacent convolutions.

The wire or convolutions of the coil may be secured together and the coil may be secured to the support by any suitable adhesive, and in cases where it is desired the whole coil may be immersed in some suitable material such as a suitable type of wax such as generally used for coil manufacture. The wire forming the coil may be offset in various ways and as distinguished from the form of the invention shown, the hills and valleys may be regular Or uniform or not, all as may be desired.

The invention may be embodied in other specific forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the appended claims are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

1. A coil of the class described for use as an antenna comprising in combination, a coil sup port having a substantially flat coil supporting surface, a relatively flat coil body on said support in the form of an annulus formed by windings of wire the adjacent convolutions of which are in substantially the same plane, said convolutions provided with portions oifset in alternate opposite directions with the offset portions of the convolutions in supporting contact with those of adjacent convolutions.

2. A coil of the class described for use as an antenna comprising in combination, a coil support having spaced substantially flat coil mp porting surfaces, a relatively flat annular coil body on said surfaces formed by convolutions of wire, the adjacent convolutions of said coil being in substantially the same plane and having a continuous series of offset portions forming connected together Ss with portions of the Ss of the inner convolutions in supporting contact with portions of those of the convolutions next adjacent thereto spacing the non-contacting portions of the convolutions and providing spaces between said convolutions except for said contacting portions, and said contacting portions of the convolutions being secured together.

3. A coil of the class described for use as an antenna comprising in combination, a coil support having circumferentially spaced coil supporting surfaces in substantially the same plane, a flat coil body in the form of an annulus having adjacent convolutions of wire on said supporting surfaces, the wire forming the convolutions having offset portions in the form of Us with the side portions of the Us connected to those of adjacent Us and portions of the said Us of one convolution contacting with those of adjacent convolutions providing contacting portions for the convolutions spaced around the coil and holding non-contacting portions of the convolutions out of contact, and means securing contacting portions of the convolutions and said convolutions and supporting surfaces together.

HENRY GIROUX. 

